21 lines
821 B
Text
21 lines
821 B
Text
{{task heading}}
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Write a stateful function, class, generator or co-routine that takes a series of floating point numbers, ''one at a time'', and returns the running [[wp:Standard Deviation|standard deviation]] of the series.
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The task implementation should use the most natural programming style of those listed for the function in the implementation language; the task ''must'' state which is being used.
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Do not apply [[wp:Bessel's correction|Bessel's correction]]; the returned standard deviation should always be computed as if the sample seen so far is the entire population.
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;Test case:
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Use this to compute the standard deviation of this demonstration set, <math>\{2, 4, 4, 4, 5, 5, 7, 9\}</math>, which is <math>2</math>.
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;Related tasks:
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* [[Random numbers]]
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{{Related tasks/Statistical measures}}
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<hr>
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